if you hover your mouse over the attributes it tells you what they primarily do. For instance, if you never plan on leaving england, and start the game with an english manager, your adaptability can be set to 1, as that stat is primarily related to your ability to manage in other leagues.
Or, if you dont ever want to coach GK, you can set that stat to 1 and spread the numbers around.
Personally, I set the adaptability, GK, and Fitness all to 1 and then pump up the rest.
Motivating and Man Management are two stats that any manager should prioritize, as it impacts your ability to chat with your players.